Typewriting machine



F. A. HART I TYPE-WRITING MACHINE Filed Feb. in, 192s WITNESSESINVENTEIR' fuw MM @4 M 91% TEHNEY Patented Dec. 23, 1924.

FREDERICK A. HART, OF NEW BRITAIN,

CONNECTICUT, ASSIGNOR TO REMINGTON TYPEWRITER COMPANY, OF ILION, NEWYGRK, A. CORPORATION OF NEW YORK.

TYPEVVRITING MACHINE.

Application filed February 10, 1923. Serial No. 618,180.

To all whom it may concern:

Be it known that I, Fnnonnron A. HART, citizen of-the United States, andresident of New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inTypewriting Machines, of which the following is a specification.

My invention relates to detachable types for the type bars of writingmachines, and its principal object is to provide a detachable typecarrying member of cheap and simple construction which may be readilyattached to and held rigidly on the body of the type bar, and mayreadily be detached therefrom and replaced by another type carryingmember of similar construction but I with a different type.

hereinafter To the above and other ends which will hereinafter appear,my invention consists in the features of construction, combinations ofdevices, and arrangements of parts to be described and particularlypointed out in the appended claims.

The preferred form of my invention is illustrated in the accompanyingdrawings wherein- Figures 1 and 2 are respectively a top plan view andside elevation, drawn to an enlarged scale, of a type bar embodying myinvention.

Figures 3, 41 and 5 are fragmentary operating views showing the mannerin which the type carrying member is attached to the body of the typebar; and

Figures 6 and 7 are respectively a top plan and side elevation of thedetachable type carrying member drawn to an enlarged scale.

As shown in the present instance, the type bar is made in two parts, thebar portion 1 being provided with a pivot 2, which engages rotatively ina hanger 3, which may be secured to the type bar support of the machine.The two-part type bar is adapted to be swung on its pivot 2- from itsnormal position of rest into operative contact with the platen (notshown) by key operated type bar actuating devices which may comprise alink at pivotally connected at 5 to the tail portion 1 of the type bar.Near its free end the stub bar or body portion 1 may be provided withtwo laterally projecting headed pins or rivets 6 spaced apart andcomprising connections designed to co-operate with the other type barpart or detachable type carrying member. Said part or member, shownseparate in Figs. 6 and 7 and designated as a whole by the numeral 7 ispreferably made of sheet metal, the body of the member being plate-likein form and its forward end being curled at 8 to provide an opening orsocket, indicated at 9, which may receive the shank 10 of'a type proper11. The shank 10 may be slightly tapered and the hole or socket 9correspondingly reamed out on a taper so as topermit the type readily tobe secured in place by a driving fit. The body of the disconnectible ordetachable member 7 is formed with an elongated slot, indicated at 12,the opposite ends of said slot being closed and one of its sides, i. e.,the upper side, being formed with a transverse opening or mouthindicated at 13, the width whereof is less than the distance apart ofthe projections or pins 6. The portion of the slot 12 forward ofthetransverse entrance or mouth 13 has parallel sides which are spacedapart, providing a rigid jaw or tongue and so as to fit snugly over theshank of the forward one of the two headed pins 6. The thickness of themetal of which the type bar. part 7 is composed is such that said plateis closely confined between the under or inner face ofthe head of saidpin and the adjacent face or side of the bar 1. The portion of the slot12 rearward of the mouth 13 is narrowed, as indicated at 14, the narrowportion terminating in an eye 15. This construction provides an upperjaw 16 which has sufficient springiness or yield to act as a detent orinterlock in association with the rearmost pin 6. The under face of theaw 16 is slightly out out near its free end, as indicated at 17, so asto fit over the top part of said pin, and forward of said cut-out theunder edge of the jaw is so shaped that the space between it and thebottom edge of the slot 12, which space may be designated by the numeral18, is slightly less than the diameter of the pin or rivet 6. Thisnecessitates that the jaw or tongue 16 must yield or give in order thatthe slot may expand and the pin may interseat with the cut-out ordepression 17, and after thus yielding-expanding or giving the spring ofthe jaw is sufiicient to snap over the pin and detent it or interlockwith it and press a lower section of the round pin into a notch orrecess 19 in the shank 20 of the type-carrying member.

In Figs. 3, 4 and 5 I have illustrated the method of attaching the noveltype carrying member 7 to the type bar. Preferably the bar is firstswung up close to the platen and away from the other bars of the set,thus rendering it more accessible for the application of the typecarrying member 7. In applying said member the type bar or body 1 may beheld by the left hand of the operator and the member 7' connected orattached by the right hand. First the member is passed over the body ofthe bar at an angle, as shown in Fig. 3, the forward pin 6 passingthrough the mouth 13 of the slot 12 and being brought opposite theopening of or entrance to the forward portion of said slot, thusbringing the parts into the Fig. 3 relationship. Thereafter the member 7is pushed or thrust rightward, as indicated by the arrow in Fig. 3,causing the slot to traverse the forward pin until the member 7 isarrested by the engagement of the front closed end of the slot with thepin, as shown in Fig. Next the member 7 is swung upward pi votally aboutthe front pin 6, as indicated by the arrow in Fig. t, the rear pin 6passing relatively through the mouth of the slot 12, the pivotalmovement of the member continuing until the bottom edge of the slotcontacts: with the rear pin 6, as illustrated in Fig. Finally the member7 is pulled. longitudinally forward or to wards the left, as indicatedby the arrow in Fig. 5, the rear pin springing the jaw 16 slightly andinterseating with the depression 17 and the corresponding bottom portionor opposite edge 19 of the slot-way 12. as illustrated in Fig. 2. Theconstruction is such that the piece 7 is thus held substantially rigidlyon the body of the bar, being confined snugly between the heads of thepins 6' and the face of the bar 1 so that rattling is prevented. Thetongues or jaws separated by the entrance-way 13, overhang the pins 6and hold them against the bottom edge of the slot 12. Moreover, thedetent or interlock 16, engaging tightly with the rear pin 6, willprevent anv sliding or slipping of one of the parts on the other. Thenarrow or contracted portion 14 of the slot 12 is considerably less inwidth than the diameter of the rear pin 6, so that the said. pin ispositively stopped by the front end of said narrow portion, andconsequently when the type bar is swung pivot-ally on the center 2, anytendency, due to centrifugal force, of the member 7 to move outward orlongitudinally of the part 1 and away from the pivot 2 is checked andprevented by the rear pin.

My present construction has been designed more particularly for the No.11 Remington typewriting machine and is intended primarily to be appliedto the outer face of the right-hand type bar of the set of type bars ofsuch machines when employed in connection with the usual Remington \Vahlc-on'iputing devices. In such Remington-\Vahl computing machines all themunber keys are intended to operate the computing mechanism and it hasbeen found undesirable in practice to have the number keys actuated forwriting dates and the like. In order to overcome this objection myinvention was designed for the purpose of enabling one of the type bars,preferably the rigl'it-hand type bar of the set of type bars, to be usedas a dating type bar, there being provided a full set of thirty-onedisconnectible type bar parts or detachable members 7, each providedwith a different number type and each intended of course to be used onlyfor the appropriate day of the month, the plates 7 being attached anddetached daily in rotation to the pivotal or main part of the type bar.It will be understood of course that the general idea of the inventionmay be extended and that one of the other type bars, say the nextadjacent type bar at the left, may be employed for writing the months,logotypes similar in construction to the detachable member 7 beingemployed for this purpose in connection with a stub type bar. It is ofcourse evident that the principles of the invention may be made use ofin other connections than that for which the invention was primarilydesigned and as illustrated herein.

What I claim as new and desire to secure by Letters Patent, is

1. A type bar for writing machines comprising two parts, anddisconnectible connections between said parts comprising a plurality ofprojections on one of said parts, said projections engaging in a slotinv the other part, said slot being provided with oppositely closed endsand being eXpansible near one end portion.

2. A type bar for writing machines co1nprising two parts, anddisconnectible connections between said parts comprising a plurality ofprojections on one of said parts, said projections engaging in a slot inthe other part, said slot being provided with oppositely closed ends andhaving a mouth or opening in one of its sides between said closed endsthrough which month said projections are adapted to pass,

3. A type bar for writing machines comprising two. parts, andconnections. between said parts comprising a pair of headed pins spacedapart and projecting from the side of one part, the other part beingformed with a slot in which said pins are adapted to engage, said slothaving its opposite ends closed, the slotted part being provided with adetent interlocking with one of said headed pins, said detent beingformed by a portion of the slotted part itself.

4. A type bar for writing machines comprising a pivoted body portion anda sheet metal type carrying portion detachably secured to said bodyportion, said body portion being provided with two laterally projectingheaded pins or rivets, and said type carrying portion being slotted toengage with said rivets, the slot being shaped to provide a springdetent that interlocks with one of said rivets and also being formed soas to prevent displacement of said sheet metal type carrying portion dueto centrifugal force when the type'bar is swung on its pivot.

5. A detachable type carrying member for a type bar, said member beingformed with a slot to engage projections on the body of the type bar,the slot providing a spring jaw to interlock with one of saidprojections and a rigid jaw to co-operate with the other projection.

6. A detachable type carrying member for a type bar, said member beingpreferably made of sheet metal having an eye to receive the type properand being formed with a slot to engage projections on the body of thetype bar, the slot providing a spring jaw to interlock with one of saidprojections and a rigid jaw to co-operate with the other projection.

7. A type bar for writing machines comprising a pivoted body portion anda detachable type-carrying portion, one of the portions havingprojections and the other a slot with a transverse entrance mouth of aWidth less than the distance apart of said projections.

8. A type bar for Writing machines com.

prising a pivoted body portion and a detachable type-carrying portion,one of the portions having projections and the other having a slot toreceive said projections, the said slotted portion being formed withseparate overhanging tongues which hold said projections against thebottom edge of the slot when the parts are properly assembled and toprevent movement of the type-carrying portion on and relatively to theslotted portion.

9. A type bar for Writing machines comprising a pivoted body portion anda detachable type-carrying portion, one of the E. M. WELLS.

